Colonoscopy clinicians in Manhasset, New York

CMS lists 40 clinicians with a primary specialty of Gastroenterology, Internal Medicine, Family Practice, or General Practice who have billed Medicare for at least one colonoscopy and practice in Manhasset, New York (details below).

Colonoscopy volume

Clinician	Colonoscopies billed	Percentile rank
Kevin Tack, MD	292	96%
Matthew Horowitz, MD	229	92%
Felice Mirsky, MD	226	91%
John Costable, MD	224	91%
Kostas Sideridis, MD	199	88%
Donald Palmadessa, MD	162	82%
Paul Berg, MD	144	79%
Ronald Greenberg, MD	135	76%
Chun Kit Hung, MD	131	75%
Benjamin Stern, DO	117	70%
Bethany Devito, MD	113	69%
Keith Sultan, MD	107	67%
Leena Sayedy, MD	101	64%
David Robbins, MD	92	61%
Christopher Dimaio, MD	81	55%
Larisa Garkusha, MD	78	54%
Faisal Sheikh, DO	72	51%
Kara Raphael, MD	66	48%
Mary Cheung, MD	62	46%
Michael Ashamalla, MD	56	42%
Abdallah Beano, MD	54	41%
Isabella Bergagnini, DO	52	40%
Aditya Sreenivasan, MD	52	40%
Matthew Whitson, MD	51	39%
Matthew McKinley, MD	42	34%
Steven Geier, MD	36	30%
Craig Smolow, MD	34	29%
Larry Miller, MD	22	21%
Susan Ramdhaney, MD	21	20%
Diana Wee, MD	21	20%
Firrah Saeed, MD	13	15%
Jack Mlabasati, MD	12	14%
Sanjaya Satapathy, MD	11	13%
Paul Broomfield, MD	1-10	13% or below
David Kadosh, MD	1-10	13% or below
Gursimran Kochhar, MD	1-10	13% or below
Christian Kuntzen, MD	1-10	13% or below
Nitzan Roth, MD	1-10	13% or below
Samip Shah, MD	1-10	13% or below
Howard Zimmerman, MD	1-10	13% or below

Sorted by the number of colonoscopies billed to Medicare, highest first, not by quality or skill. CMS suppresses counts between 1 and 10 to protect patient privacy and publishes the range instead.

Understanding CMS Data

CMS's "Colonoscopy" category combines specific billing codes for colonoscopy to calculate the number of times each clinician billed Medicare for a "Colonoscopy." These include screening colonoscopy, diagnostic colonoscopy, and colonoscopy with biopsy or polyp removal. CMS's list also includes flexible sigmoidoscopy and laparoscopic appendectomy, so a clinician's count may include those procedures. CMS counts one procedure per patient per day, so a colonoscopy that included both a biopsy and a polyp removal counts once. CMS reports only procedures that clinicians billed to Original Medicare and Medicare Advantage. Therefore, CMS's procedure volume data does not include procedures that clinicians may have performed on patients who have other health care coverage (e.g., commercial insurance, self-pay, or the VA). Billing variation and coding errors can also affect CMS's data. Therefore, the number of procedures that CMS reports for a clinician may be higher or lower than the actual number of colonoscopies a clinician performed during the reporting period. Lastly, only clinicians with a primary specialty of Gastroenterology, Internal Medicine, Family Practice, or General Practice (as reported to Medicare) are presented.

Source: Centers for Medicare & Medicaid Services (August 18, 2026 release).